After 3-4 days of the process, the new confinement will cover the 4th power unit, regime director Yevgen Katunin told the agency.

The new safe confinement is approximately 109 metres high and 250 metres wide and 150 metres long. Produced by a French company Novarka, it is now considered the biggest moving structure in the world.

The money for the structure was raised by several donor states. The confinement will prevent emissions of radioactive dust into the environment and also block moisture from penetrating inside the ruined reactor.